Carbureter.



F. G. SCHWEISTHAL.

- y CARBURETER;

APPLICATIQN FILED MAY 20, 1916. 1,261,059., Patented Apr. e, 191s 2 SHEETS-SHEET l.

F. Gl SCHWEISTHAL.

CARBURETER.

y APPLCATlON FILED NHV/20,191,5- 1,261,059; Patented Apr. 2, 1918.

2 SHEETS-SHEET 2.

pccceticn ci Letters 1.?etcnt.

iPe'tenterl Apri. 2f.,

e @El wim/m, may eminem;

J it hnewn thnt l",

criteri-IAL, e cirizcnof the United States,

i hiring et Chicege, in the county of Cool;

and. @tete ci lllineis, here invented certain new en@ retcrs, er tien.

This invention relates to cerhirreters cf the in tiene emholyinn; e primary eir supply, eine nseiinl improvements in Carhu Whichthe fclowing is a specihce liery er fry eir supply, a fuel nemiciA j troni which the cerburetefl 'to the engine, each source l; r with e valve te f, .i ether ehjects in View, )A te tieie invention consists stru tien, combination and zxrell hereinafter more i ei. incl illustretefl in c wings, wherein@- n View 01"' :i cerlonreter nice with the present 1he throttle control, nstnhle step used 1n cen- Fig; L e'iemticn of the intake cnil ci the er rj; er secm'idary er sup plyg ceci illus. the clelails in construction 01"' the shutter controlling the same,

is e side elcreticn thereof.

lfnrecnice;

Fig. 6 is a horizontal section elcng line Reference being hed, more particularly to the drawings, 10 indicates the carourctcr howl ncios'ing the float chamber 11., from one side of which projects the fuel inlet nipple 12, exteriorly threaded 1er securing the supply pipe thereto. Adjacent te the nipple 12 is u pivot 13 which acts as e support for the arms 14, seid arms carrying the Hout 15 concentriczrlly arranged with respect to 'the lient chamber 11. The outer ends et," the arms carry the valve 16 by Ineens of the hearing 1?' for the receptien'of the valve stemthe latter being hclci in place by the nut 18. The valve 16 is seetergl in Jthe inner end of the passage of the nipple 12 when the float is elevated and as the ioet drops, the valve is unseetcd permitting' e. Quantity o fuel to flow through the nipple 12 into the iioat chamber 11.

A shell 19 is locutecl concentrically Within the loat chamber l1, and is encircled hy the Heat 15, seid shell bcinr'tuhnlur except adjacent te its lower end, where it is prcvifled with a partition 20. A. transverse passage 21 is formed in the partition 2G and cern municates :it each end with the iiont chamher te forni e means ci communication he tween scifi Hout chamber uncl the mixing; chamher` which is contained within the shell 19. The fuel nozzle 2Q is threndel inte the partition midway oiZ the length of the passage 2g, and is prcvicled with e conical passage 23 'which communicates with scid liessnge 9.1, thereby creating n ineens wherby the inei within the lient chamber may enter the passage 21, whence it escapes through the passage E23 to thc cerbureting chamber 24 at the upper end ci the nozzle 22. The lower end of the shell. 19 which prc jects through the base of the howl 10 is prrr vided with a shoulder 25 which rests flush :against the exterior surface of s: irl howl.

Conccntricelly formed in connection with, the partition 20 is a sind 26 projecting he vend the terminal of the shell 19, Seial stufl oeing provided es e means for securing;l the primary air supply pipe 27 te the carhnreter. This supply pipe is orificccl to receive the protecting end of the Shelli@ as illustrctetl in Fig; Q, while the stud 26 pierces the terminal ef scid pipe and'prejects heyoncl the seme, The projecting enti er the etud 1G li 26 has a nut 28 threaded thereon which rests against the outer side of the primary air supply pipe 27 and locks the same upon the studso that vthe upper side of the pipe is securely held against the bottom of the bowl and embraces the projecting end of the shell 19. The primary air supply is provided with the usual valve 29, which controls the iow of air therethrough.

In order that the primary air supply may have access to the carbureting chamber 24, the partition is pierced by the conduits 30 on each side of the passage 21 so that the air from the primary air supply pipe 27 enters the mixing chamber below the terminal ofthe nozzle 22 and mixes with the fuel ejected from the passage 23 of said nozzle at a point .adjoining the terminal of the nozzle.

The interior of the upper end of the shell 19 is threaded for the reception of the'tubular exteriorly threaded stud 31 which carries the transversely arranged, elongated casing 32 at its outer end. The mixture of air and fuel is conducted from the carbureting chamber 24 through the tubular study 31 tothe casing 32. One end of this casing curves upwardly as at 33, and terminates in an elliptical plate 34, by means of which this end of the casing 32 is secured to and connects with the manifold, (not shown). This is the gas outlet and is controlled by the throttle butterly valve 35, which is carried by the lvalve stem 36 vertically arranged within one end of the casing 32, and

projecting through the upper portion of the wall thereof.

The opposite end of the casing 32 constitutes the auxiliary air inlet, and is controlled b the auxiliary or secondary air buti terfly va ve 37, which is carried by the valve stem 38. Like the valve stem 36, the stem- 38 is arranged transversely of the casing 32 and projects through the upper portion of the wall thereof, said stem resting approximately parallel to the stem 36. This secondary or auxiliary air inlet end of the casingV 32 is surrounded by an elliptical plate 39 to which is secured the stationary shutter plate 40, the same being held in position by screws or other detachable means, and is provided with the central openings 41, whereby the secondary or auxiliary air may pass through the plate. At the point where the openings 41 converge is located a pivot pin 42, which projects inwardly from the center of the plate 40, where it carries the pivotally mounted shutter 43 adapted to oscillate on the pin. A series of openings 41a similar to the openings 41 of the plate 40 are provided in the shutter and are adapted to register, when desired, with the openings 41 of the plate 40. The oscillation of the shutter 43 upon'its pivot regulates the quantity of air which can pass through the openings 4l by reason of the fact that the solid portions ot" the shutter 43 may, by the latters oscillation, partially or wholly close the openings 41. In order to provide a means for holding the shutter plate 43 in any of its adjusted positions, a boss 44 projects from one side of the plate or flange 39, and coperates with an extension 45 projecting from the shutter 43, said extension resting flush upon the boss 44, and adapted to oscillate thereacross. A curved slot 46 is provided in the extension 45, and receives a screw 47, which passes through said slot and is threaded into the boss 44. It-becomes manifest that after the shutter 43 has been adjusted to the de sired position to regulate the flow of air that portion of the control `,lever 48 embrac-v in the stein 38 is a toothed segment 49. The v( ve stein 38 of the butterfly valve 37 is provided with a sleeve 50, above which is a toothed segment 5l, similar to the segment 49, and in the saine horizontal plane therewith. These segments 49. and 51 are provided for the simultaneous and proportionate adjustment of the butterliy valves 35 and' 37, whereby the amount of auxiliary or secondary air is increased simultaneously and proportionately to the amount of carbureted fuel supplied to the engine. Y

Asis usual in carbureters, the iiow of fuel from the fuel nozzle 22 is controlled hy a needle valve 52, which atv its lower end seats in the conical passa e of the nozzle 22, and regulates the How-o? fuel therefrom in proportion to the amount of the passage 23 closed by the inner end of said needle valve. The outer end of the needle valve is provided with a knurled disk 53 for the manual adjustment of said valve. An interiorly threaded tubularV extension 54 is formed from the upper portion of the wall of the casing 32, and constitutes a bearing through which the needle valve operates. An exteriorly threaded bushing 55` is threaded into this bearing 54 and carries the spur gear 56 at its upper terminal, said spur gear meshing with the i segments 49 and 51. This bushing 55 is provided with a central interiorly threaded passage, through which the needle valve stem 52 passes, said stein being provided with the threaded portion 52" for coperating with the threads of the passage within the bushin Obviously, a rotary movement imparte to the knurled disk 53 The protruding end of the throttle valve i iifnj Las? will eausethe stem of the needle valve 52 `te we anemona rotate Within the bushing 55, thereby manually adjusting the valve independently of any movementon the part of the bushing. In order to lock the' needle valve with respect to the bushing after it has been initially adjusted, a lock nut 59 is provided on the outer end of the threaded portion 5'? of the needle valve, so that it may be tightened against the gear 56 of the bushing. After the needle valve 52 has been initially and manually adjusted, a movement of the throttie controlrlever 48 adjusts not only the throttle valve 35, but also through the segment 49, meshing with the gear 56 of the bushing 55, adjusts said bushing so that the needle valve is simultaneously and propor tionately adjusted with the throttle buttery valve 35. The movement of the gear 56 and the bushing 55 clearly imparts a similar movement to the segment 5l, which meshes with the gear 5G to adjust the secondary or auxiliary air inlet valve 37 as heretofore described.

The throttle control lever 48 is provided with a right-angular extension 60 through which is threaded a screw 61, said screw being held fixed 'with res ect to the extension G0 by means of the loc -nut 62 mounted on the stem of the screw. between the head tl reo and the extension G0. The projecting free end of this screw 6l cooperates with a stationary rib or cam G3 formed on the hearing 54, and constitutes a stop for the throttle control lever 58, the amount of dll gears on the stems of said throttle and auxlj lary air valves respectively, a' gear on the ybushing aforesaid meshing with the gears 0n the stems of the throttle and air valves, a

"j'ito'fi upon said bearing, a throttle control reifer iixed tothe stem of the throttle valve for the operation of the gears aforesaid, and an adjustable stop carried by said lever for coperation With the stop on said bearing.

Q. In a carbureter, the combination with a casing, of a bearing projecting therefrom, a bushing threaded into said bearing, a fuel valve threaded into said bushing, a throttle valve upon one side of said bearing, an auxillary air valve upon .the other side of said hearing, the stems of said valves protruding from the casing substantially parallel to theY hearing aforesaid, a gear fixed lto said bush ing, and gears carried by the projecting stems of the throttle and auxiliary air valves respectively and meshing with the gear on the bushing.

FREDERICK G. SCHWEESTHL. 

